Heat-controlling apparatus.



M. J. BRIERTY. HEAT ONTBOLLING APPAB. US.

APPLIGATION FILED ulm y rnv/WWW? M. J. BRIBRTY. HEAT coNTRoLLNG APPARATUS.

ESM

2 SHEETS-SHEET Z.

Patented Nov. 3,

APPIGATION FILED JAN.20.1908l MICHAEL J. BRIERTY, OF CHICAG, ILLINOIS.

HEAT-CONTROLLING APPARATUS.

Speccation of Letters Patent.

Patented Nov. 3, 1908.

Application tiled January 20, 1908. Serial No. 411,715.

To all whom it may concern:

Be it known that I, MICHAEL J. BRIERTY, a citizen of the United States, residing 4at Chicago, in the county of Cook and State of Illinois, have invented a newv and useful Improvement in HeatControlling Apparatus, of which the following is a specification.

My invention relates particularly to heatcontrolling apparatus having an electriccontrolling circuit; and my primar? object is to provide improved electrica ly controlled means for regulating the temperature of the atmosphere in a room or the like.

My invention is illustrated in the accompanying drawings, in which- Figure 1 shows by a -vertical sectional view a building supplied with a heater or furnace equipped with draft and check doors or dempers controlled by my improved apparatus. Fig. 2 is a similar view i of a room equipped with a radiator for furnishing heat to 1t, the admission of the heating medium to the radiator being shown as controlled by my improved apparatus. Fig. 3 is a section taken at the line Bon Fig. 2 and viewed in the direction of the arrow,

showing the radiator in plan; and Fig. 4 isV a view of my improved apparatus in elevation, with its enveloping case removed, t o gether with a thermometer represented 1n circuit lth the a paratusj. for controlling the opera ions of t 1e latter.

My improved apparatus is designed to be 4used. preferably in' conjunction with a circuit makingand breaking thermometer whereby electrical connections with the aparatus may be established and broken un' ger the influence of changes in tem erature of the atmosphere surroundingl t e thermometer and thus the source of eatsuppl be. regulated to maintain `approximate y evenl temperature.

My improved apparatus 5 Ycom rises a base 6, an electric motor 7 secure 'to base and provided on its amature-carrying shaft 8 with a pinion'9 ,which meshes d1- rectly with the gear 1 0 of a. train of gears 11, 12, 13, 14, .15 and 16, suitably uprghts 17, (one only of whic is shown) secured onthe base v6, thearbor 18 of the gear 16 of the train carrying a ctankrarm 19 and .a' commutator 20 containin a seg.- ment 21 of insulating material. e a `aratus further comprises brushes 22,22, w ch ivoted as irulicated` at 23 bepreferably are between theears 24 ofa tween their en s 'ournaled in cross-member 25 preferably of insulating material extending between the two uprights 17, the brushes 22 being caused to bear against the connnutator 2() through the medium of adjusting screws 26 working `through the upper ends of the brushes 22 and against the cross-member 25; and a relay 27. The relay comprises an electromagnet 28 provided with heads 29, 29, preferably of insulatin material and supported on the base 6 as t rough the medium of a metal plate 30; a contact-bar 431 mounted in an u right 32 secured to the plate 30 referab y formed of insulating materia a metallic arm 34 pivoted at its lower end to ears 35 on the late 30 to be swung back and forth into anfout of engagement with the contact 31 and a contact 36, which may be secured to the ad'acent head 29, as shown; and a spring 37 astened to the upper contact member 38 of the arm,34 and to an eye 89 of insulatin material carried by the contact-bar 31 an serving to normally hold the arm 34 against the contact 3l. he gears of the train are preferably so constructed and arranged that the ratio of movement be-` tween the pinion 9 and arbor 18 is about 400 tol, w ereby, upon rotating the motor as hereinafter described, the arbor 18 rotates very slowly, but aifords relatively great power.

In Fig. 1, the apparatus 5 is shown as applied to a furnace 40 located inV a base# ment and sup lying heatto a room above it. The furnace i lustrated has a check-door 41 and a draft-door 42 connected together by a chain 43 extending over pulleys 44, 44, the y length of the chain 43 being such as to cause y one door to be open whent i e other is closed. The a paratus y5 is shown as supported from a brac et 45 'with its crank-arm 19 connected with the chain, as indicated, at 46 for drawing the latter up and down and opening and closin' the doors 41 and 42, as ereinafter descr-'i d.l The room above the basement is shown to contain an electric thermometer 47 which Amay be of any7 suitable ty e, the one shownin Fi .i 4Ybe1-ng the one esired and comprisin ree contact-points 48, 49 and 50 extending into the path of the mercury contained 1n the bulb 51 and tube 52 of the thermometer, and connected through wires 53, 54 and 55 to buttons 56, 57 and 8 respectively; and a switch 5.9 adapted to be swung into engagement wlth any one of the buttons- The electrical connections between the )arts described and the thermometer are as ollows: Wires 60 and 61 connect the brushes 22 and 22 with the contact 36 and contact 31, respectively. A wire 63 leads from the commutator 20 to one of the brushes of the motor 7, the connections of the motor being such, as is well understood in the art, to constitute the terminal 64 of the field magnet 65 of the motor the other connection for the motor, this terminal 64 connecting with an electrode 66 of one of a set of two batteries 67 and 68 through the medium of a wire 69. The terminals 70 and 71 of the coil 28 connectrespectively with a binding-post 72, also serving as a binding-post for the arm 34 by reason of its metallic connection therewith, and with the switch 59 of the thermometer, through the medium of wires 73 and 74 respectively, a wire 75 connectin the binding-post 72 with an electrode 76 oA the cell 68. A wire 77 connects the other electrode 78 of the cell 67 with the other electrode 79 of the cell 68, and a wire 80 connects the mercury in the bulb 5l of the thermometer with the electrode 78 of the cell 67.

The operation of the appartus is asiollowsLAssumin the switch 59 of the thermometer to be in contactwith the button 57 and the mercury in the bulb and tube 51 and 52 to have just made connection with the contact 49, as illustrated, a circuit is established through the battery, Wire 80, thernioineter 47, wire 74, magnet 28'* and wires '73 and 75, thereby energizing the magnet and causing the arm 34 which constitutes the armature for the magnet, to be swung from the position illustrated in Fig. 4, into engagement with the contact 36, a ainst the resistance of the spring 37, there y establishing the following circuit: The current passes from the battery through the wire 75,

inding-post 72, late 30, the armature 34 and contact 36; t ence through the wire 60 to the brush 22.; thence through the brush, the' commutator 20 and wire 63 to the motor 7 through the motor, and from the motor through the wire 69 to the battery thus coinpleting" the circuit through the motor. The circuit .thus established through the motor immediately causes it to operate, the motor continuing to run until the commutator 20 has-been turned about one-half a revolution, thereby carrying the segment 21 of insulatinaterial fromthe osition illustrated in Fig. 4 in contact wit the brush 22, into contact with the brush 22 with the effect of breaking the circuit ,through the motor and thus stopping it. The turning of the arbor. 18 and commut ator20 about one-half a revolution as described, causes the crank .19 to be turned from the u wardly` extending p0- sition illustrated in ig. 4` to a. depending position, which thus causes `the draft-door 42 to be closed and the check-door 41 to be driven shaft, motor and `sh constructed and varranged opened. It will be understood that as long as the mercury in the tube 52 remains iii contacti with the contact 49, a current passes through the magnet. 28 and the armature 34 remains in engagement with the contact 36. As soon as the mercury drops below the contact 49 the circuit through the magnet 28 is broken and the armature 34, under the influence of the spring 37, is caused to be swung to the position illustrated in Fig. 4 in which it engages with the contact 31. As soon as this occurs, the circuit is established through the battery, wire 75, plate 30, armature 34, contact 3l, wire 6l, brush 22a, comniutator 20, wire 63, motor 7 and Wire 69 to the battery, thus establishing a new circuit through the motor. The motor is thus caused to again operate, and in the same direction as before, and it continues to run until the segment 21 is brought into contact with the brush 22, whereupon the circuit is again broken through the motor. The operation just described causes the crank-arm 19 to return to the position illustrated in Fig. 4 with the result of opening the draft-door 42 and closing the check-door 41, as illustrated in Fig. 1. Succeeding operations of the apparatus are repetitions of those just described, the magnet being' energized when the temperature in the room reaches that desired to close the draft-door and open the check-door, and denergized to reverse the operation when the temperature of the atmosphere drops below that desired.

In the arrangement illustrated in Fig. 2, my improved apparatus is designed to control the admission of a heating medium, such as steam or hot water, into a radiator 81 under variations of temperature in the room 82 in which it is located, thro h the medium of a thermometer as describe As shown, the crank-arm 19 of the apparatus 5 connects with a crank-arm 83 on the admission valve 84 of the radiator 81, whereby, in

' the operations of the apparatus as described,

the crank-arm 19 is moved one-half a revolutiontto open the valve 84 and the other half to close it under the influence of electrical circuits established through the apparatus 5, as described.

From lthe foregoin description it will be readily understood t at the construction of my ap aratus is such as to render its operation re i'able and accurate and very sensitive to changes in temperature.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination withfa source of electro-nietor force, of an electric motor, a 'gtear-connection between the a a make-and-break device to make and break circuit'under `changes in the temperature of the atmosphere surroundi it, an electro-magnet in circuit with sai makeand-break device, a set of electrical contacts insulated from each other, an armature for the magnet suitably pivoted near its lower end to adapt it to be swung back and forth into alternate engagement with said contacts, means for yieldingly holdinfr said armature in engagement with one oi? said contracts, and means in circuit with said contacts and the motor for maintaining the current throu h the latter during the turning of the sha i a predetermined distance while n n u l the armature remains 1n unchanged condi tions.

2. The combination with a source of electro `motor force, of an electric motor, a driven shaft, gear connection between the motor and shaft, a contact making and breaking device constructed and arranged to make and break circuit under changes 1n the temperature of the-atmosphere surroundin it, an electro-ma net in circuit with sai make-and-break evice, an armature for the magnet operated against an end thereof and constructed and arranged to be normally out if contact therewith, a set of electrical contacts with which the armature is adapted t0 alternately and bodily engage, and means in circuit with said contacts and the motor for maintaining the current throu h the motor durin the turning of the sha t a predetermine( distance while the armature remains in unchanged condition.

3. The combination with a source of electro motor force, of an electric motor, a driven shaft, gear connection between the motor and shaft, a commutator carried by the shaft and containing a section of insulating material, brushes engaging with the commutator, an electrical contact making and breaking device constructed and arranged to make and break circuit through it under changes in the temperature of the atmosphere surrounding-1t, an electro-magnet in circuit with said make-and-break device, a set of electrical contacts in circuit with the brushes, the commutator `and motor, and an armature for the magnet operating against an end thereof and constructed and ar: ranged to alternately and bodily enga with the contacts of said set and direct t e current from said source through the brushes alternately and through the commutator and motor. for the pu ose set forth.

4. The combination with a source of electro motor force, of an electric motor, a driven shaft, gear connection between the motor and shaft, a commutator carried by the shaft and containing a section of insulat ing material, brushes engaging with the com mutator, an electrical contact-makingand-breaking device constructed and arranged to make and break circuit under changes in the temperature of the atmosphere surrounding it, an electro-magnet in circuit with said make-and-break device, a set of electrical contacts insulated from each other and in circuit with the brushes, commutator and motor, an armature for the magnet suitably pivoted near its lower end to adapt it to be swung back and forth into alternate engagement with Said 00ntacts and direct the current from said source through the brushes alternately and thro h the commutator and motor, and means or vieldingly holding said armature away from the magnet and in engagement with one of said contacts, for the purpose set forth.

MICHAEL J. BRIERTY.

In presence of- L. G. KIRKLAND, R. A. SCHAEFER. 

